Those are great suggestions.
We've looked into what it would take to "undo" an action, and because of the complications of dice rolls forcing some actions to be locked in, we added confirmations for most of those actions in place of "undo".

Adding information about the makeup of the deck in the game setup screen is a great idea. I'll add that to our list of features to consider. We already have a task to improve the book selection on that screen, so it's a good addition.
It's always been in our plans to make the game log have links to show the card details, so that's also coming.
We've had a few requests for action confirmation, so that's something we'll probably be adding. The dialog right now is really showing details of the action that just happened, rather than confirming before performing the action. That's most obvious when you're playing a network game and you see that when someone else plays a card. It'll also help when we get an update out that fixes the bug in the current version that is letting clicks pass through to the background when cards are zoomed.
We're glad you're enjoying the game. We should have news on the mobile versions coming out soon.